Alternating current and direct current micro-grid control method, device and equipment and storage medium

Abstract

The invention discloses an AC / DC micro-grid control method, device and equipment and a storage medium, and the method comprises the steps: responding to a control request of an AC / DC micro-grid, and constructing a mapping relation between the historical power generation amount and historical weather data in a new energy unit; obtaining future weather data in a preset future time period, and determining the corresponding future generating capacity of the new energy unit in the preset future time period according to the mapping relation; according to the maximum carbon emission of the coal-fired unit in the preset future time period, determining the maximum generating capacity corresponding to the coal-fired unit in the preset future time period; and according to the future power generation amount of the new energy unit and the maximum power generation amount of the coal-fired unit, the power generation amount of the coal-fired unit and the power release amount of the energy storage unit are controlled in combination with the preset power storage amount of the energy storage unit and the preset load of the AC / DC micro-grid. The influence of the AC-DC micro-grid on the power grid can be reduced, and the load of the power grid is reduced.

Description

Technical Field

[0001] The present invention relates to the field of microgrid technology, and in particular to an AC / DC microgrid control method, device, equipment and storage medium. Background Art

[0002] With the rapid development of renewable energy and the promotion and application of smart grids, microgrids, as a new type of energy system, have the advantages of efficient energy utilization, environmental friendliness, and reliable power supply. According to the different forms of bus current, microgrids can be divided into AC microgrids and DC microgrids. At present, with the development of distributed energy and energy storage technology and the increase in load types, AC / DC hybrid microgrids that combine the advantages of AC microgrids and DC microgrids have attracted people's attention. Compared with pure AC or DC microgrids, AC / DC hybrid microgrids have the following advantages: ① Reduces conversion links such as AC / DC and DC / AC, thereby reducing energy losses caused by multi-stage conversion; ② Can be used for AC loads and DC loads, reduce frequency conversion devices in user equipment, and reduce the manufacturing cost of equipment.

[0003] However, there is a certain deviation between the load required by the existing load and the power generation controlled by the AC / DC microgrid. The microgrid needs to be connected to the grid, but the load on the main grid will increase, which will reduce the operating stability of the main grid. At the same time, the construction cost of the microgrid is relatively high, the technology is complex, and maintenance is difficult. It cannot effectively coordinate the energy conversion and distribution between the AC and DC systems. Summary of the invention

[0004] The present invention provides an AC / DC microgrid control method, device, equipment and storage medium to solve the technical problem in the prior art that there is a certain deviation between the load required by the load and the power generation controlled by the AC / DC microgrid, the microgrid cannot be accurately controlled for grid connection, and the load of the main power grid is increased, causing the operating stability of the main power grid to decrease.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an AC / DC microgrid control method, comprising:

[0006] In response to a control request of an AC / DC microgrid, a mapping relationship between historical power generation in a new energy unit and historical weather data is constructed; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit, and an energy storage unit;

[0007] Acquire future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship;

[0008] Determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period;

[0009] According to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, and in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled.

[0010] As a preferred solution, in response to the control request of the AC / DC microgrid, constructing a mapping relationship between the historical power generation in the new energy unit and the historical weather data specifically includes:

[0011] In response to a control request of the AC / DC microgrid, obtaining historical power generation and historical weather data of the new energy unit corresponding to the control request;

[0012] Based on the time relationship between the historical power generation in the new energy unit and the historical weather data, a mapping relationship between the historical power generation and the historical weather data is constructed.

[0013] As a preferred solution, the new energy unit includes a photovoltaic unit and a wind unit, and the photovoltaic unit and the wind unit respectively have corresponding historical power generation and historical weather data; the mapping relationship between the historical power generation and the historical weather data is constructed based on the time relationship between the historical power generation and the historical weather data in the new energy unit, specifically including:

[0014] Based on a first time relationship between the historical power generation in the photovoltaic unit and the historical weather data, construct a first mapping relationship between the historical power generation and the historical weather data corresponding to the photovoltaic unit;

[0015] Based on the second time relationship between the historical power generation and the historical weather data in the wind unit, a second mapping relationship corresponding to the historical power generation and the historical weather data of the photovoltaic unit is constructed.

[0016] As a preferred solution, the first mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the first time relationship between the historical power generation and the historical weather data of the photovoltaic unit, specifically including:

[0017] Obtaining a dust cleaning interval of the photovoltaic unit, and obtaining sunshine intensity data related to sunshine in historical weather data of the photovoltaic unit;

[0018] Divide the total time period of the photovoltaic unit between each two dust cleaning intervals into a plurality of first time periods; wherein the first time relationship is the corresponding time relationship between the sunshine intensity data and the historical power generation of the photovoltaic unit in each of the first time periods;

[0019] Constructing a first sub-mapping relationship in each of the first time periods according to the sunshine intensity data corresponding to each of the first time periods and the historical power generation of the photovoltaic unit corresponding to each of the first time periods;

[0020] According to the first sub-mapping relationship, a first mapping relationship between the historical power generation and sunshine intensity data of the photovoltaic unit is generated.

[0021] As a preferred solution, the second mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the second time relationship between the historical power generation and the historical weather data in the wind unit, specifically including:

[0022] Acquire atmospheric state data involving wind speed, temperature and air pressure from historical weather data of the wind power unit;

[0023] Divide the total time period of historical power generation of the wind unit into a plurality of second time periods; wherein the second time relationship is the time relationship between the sunshine intensity data of the photovoltaic unit and the historical power generation in each of the second time periods;

[0024] Constructing a second sub-mapping relationship in each of the second time periods according to the atmospheric state data corresponding to each of the second time periods and the historical power generation of the wind power unit corresponding to each of the second time periods;

[0025] According to the second sub-mapping relationship, a second mapping relationship between the historical power generation of the wind power unit and the atmospheric state data is generated.

[0026] As a preferred solution, the acquiring of future weather data within a preset future time period and determining the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship specifically includes:

[0027] Obtaining future weather data corresponding to the photovoltaic unit and the wind unit respectively within a preset future time period;

[0028] Determining the future power generation of the photovoltaic unit within a preset future time period according to the future weather data and the first corresponding mapping relationship;

[0029] The future power generation of the wind power unit within a preset future time period is determined according to the future weather data and the second mapping relationship corresponding thereto.

[0030] As a preferred solution, determining the future power generation of the photovoltaic unit in a preset future time period according to the future weather data and the first mapping relationship corresponding thereto specifically includes:

[0031] Obtaining a dust cleaning interval of the photovoltaic unit within a preset future time period, and obtaining sunshine intensity data corresponding to the photovoltaic unit in the dust cleaning interval as future weather data of the photovoltaic unit;

[0032] According to the first mapping relationship, the power generation of the photovoltaic unit corresponding to its sunshine intensity data is determined as the future power generation of the photovoltaic unit in a preset future time period.

[0033] As a preferred solution, determining the future power generation of the wind power unit in a preset future time period according to the future weather data and the second mapping relationship corresponding thereto specifically includes:

[0034] Acquire atmospheric state data corresponding to the wind unit in a future time period as future weather data of the wind unit;

[0035] According to the second mapping relationship, the power generation of the wind power unit corresponding to its atmospheric state data is determined as the future power generation of the wind power unit in a preset future time period.

[0036] As a preferred solution, before determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period, the method further includes:

[0037] The maximum carbon emissions of the coal-fired unit are determined based on the target maximum carbon emissions of the AC / DC microgrid within a preset future time period, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit.

[0038] As a preferred solution, the maximum carbon emissions of the coal-fired unit are determined based on the target maximum carbon emissions of the AC / DC microgrid, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit in a preset future time period, specifically including:

[0039] Obtaining the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit, and the carbon emissions of the energy storage unit within a preset future time period;

[0040] The target maximum carbon emission value of the AC / DC microgrid, the carbon emission of the photovoltaic unit, the carbon emission of the wind unit and the difference between the carbon emission of the energy storage unit are calculated to obtain the maximum carbon emission of the coal-fired unit in a preset future time period.

[0041] As a preferred solution, determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period specifically includes:

[0042] Obtain the carbon emissions corresponding to each unit of coal burning;

[0043] Calculate the ratio between the maximum carbon emission of the coal-fired unit in the preset future time period and the carbon emission corresponding to the unit coal combustion to obtain the maximum coal combustion of the coal-fired unit;

[0044] Based on the maximum coal burning amount and the preset coal burning power generation efficiency, the maximum power generation amount of the coal burning unit in the preset future time period is obtained.

[0045] As a preferred solution, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, specifically including:

[0046] Obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period;

[0047] According to the preset load of the AC / DC microgrid, the future power generation of the photovoltaic unit and the future power generation of the wind unit in a preset future time period, the power generation outside the new energy unit is calculated as a first result;

[0048] According to the maximum power generation of the coal-fired unit and the preset electric energy storage capacity of the energy storage unit corresponding to the preset future time period, the maximum power generation between the coal-fired unit and the energy storage unit is calculated as the second result;

[0049] Based on the first result and the second result, determining the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit;

[0050] The energy storage unit and the coal-fired unit of the AC / DC microgrid are controlled according to the electric energy released by the energy storage unit and the power generated by the coal-fired unit.

[0051] As a preferred solution, the step of obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period specifically includes:

[0052] Acquire historical load data of the AC / DC microgrid;

[0053] Performing function fitting on the historical load data of the AC / DC microgrid, and predicting the data after function fitting based on a preset future time period to obtain a preset load of the AC / DC microgrid in the preset future time period;

[0054] Obtaining the current real-time power value of the energy storage unit and using it as the real-time power value of the first reference time period in the future time; wherein the future time includes a plurality of reference time periods, and the preset future time period is one of the reference time periods;

[0055] Based on the power balance rule, taking the real-time power value as the initial value, the real-time power value of the energy storage unit in each reference time period is recursively calculated one by one, and the real-time power value in the preset future time period is obtained as the preset electric energy storage capacity of the energy storage unit in the future time period.

[0056] As a preferred solution, the determining of the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically includes:

[0057] When the first result is equal to the second result, it is determined that the electric energy release amount of the energy storage unit is the preset electric energy storage amount of the energy storage unit, and the power generation amount of the coal-fired unit is the maximum power generation amount of the coal-fired unit in the preset future time period;

[0058] When the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in the future time period, and the AC / DC microgrid is connected to the grid.

[0059] As a preferred solution, the determining of the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically further includes:

[0060] When the first result is less than the second result, determining the proportion of the preset electric energy storage capacity of the energy storage unit to the maximum electric energy storage capacity;

[0061] If the proportion is greater than or equal to the preset threshold, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, and the amount of power generated by the coal-fired unit is the difference between the first result and the preset amount of electric energy stored in the energy storage unit;

[0062] If the proportion is less than the preset threshold, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the future time period, and the electric energy released by the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the future time period.

[0063] The AC / DC microgrid also includes a carbon emission unit, wherein the carbon emission unit guides the distributed energy and loads in the microgrid to be optimally dispatched through a preset carbon emission quota and a carbon trading mechanism.

[0064] Accordingly, the present invention also provides an AC / DC microgrid control device, comprising: a mapping relationship module, a future power generation module, a maximum power generation module and a power generation control module;

[0065] The mapping relationship module is used to construct a mapping relationship between the historical power generation in the new energy unit and the historical weather data in response to the control request of the AC / DC microgrid; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit;

[0066] The future power generation module is used to obtain future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship;

[0067] The maximum power generation module is used to determine the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period;

[0068] The power generation control module is used to control the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, combined with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid.

[0069] Correspondingly, the present invention also provides a terminal device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the AC / DC microgrid control method as described in any one of the above items is implemented.

[0070] Accordingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the AC / DC microgrid control method as described in any one of the above.

[0071] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0072] The technical solution of the present invention starts to execute the corresponding AC / DC microgrid control by responding to the control request of the AC / DC microgrid, and predicts and determines the future power generation of the new energy unit by constructing the mapping relationship of the new energy unit, and determines the maximum power generation of the coal-fired unit by the maximum carbon emission of the coal-fired unit. Finally, it can combine the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid to realize the control of the power release or output of the energy storage unit and the coal-fired unit, avoid the load required by the load and the power generation controlled by the AC / DC microgrid, avoid the load on the main power grid caused by controlling the microgrid to be connected to the grid, reduce the impact on the operation of the main power grid, and also improve the accuracy of the microgrid control, avoid the instability of the output release or output power between the units in the AC / DC microgrid, and improve the stability of the AC / DC microgrid.

[0073] Furthermore, the AC / DC microgrid control method of the present invention fully considers the power generation of the new energy unit and the coal-fired unit, and controls the AC / DC microgrid based on the power generation of the three units, the preset load of the AC / DC microgrid and the preset electric energy storage capacity of the energy storage unit, so that the AC / DC microgrid can reduce its dependence on the main power grid while meeting its own needs, reduce the number of grid connections, and thus reduce the load of the main grid, thereby ensuring the stable operation of the main power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 : A flow chart of the steps of an AC / DC microgrid control method provided in Embodiment 1 of the present invention;

[0075] Figure 2 : A flow chart of the steps of an AC / DC microgrid control method provided in Embodiment 2 of the present invention;

[0076] Figure 3 : A flow chart of the steps of an AC / DC microgrid control method provided in Embodiment 3 of the present invention;

[0077] Figure 4 : A structural diagram of an AC / DC microgrid control device provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] AC / DC microgrid: An AC / DC microgrid is a power system that integrates AC and DC elements. It can supply power to both AC and DC loads and can efficiently integrate distributed generation resources, such as solar photovoltaic, wind power, and energy storage systems. In this embodiment, the distributed generation resources to be controlled by the AC / DC microgrid include new energy units (new energy units include photovoltaic units and wind power units), coal-fired units, and energy storage units.

[0080] Photovoltaic unit: The photovoltaic unit can adopt a maximum power point tracking control strategy to achieve maximum power output under different light and temperature conditions. In the grid-connected mode, the photovoltaic unit converts direct current into alternating current with the same frequency and phase as the grid through an inverter, and may need to meet low voltage ride-through requirements to maintain grid stability; in the off-grid mode, the photovoltaic unit needs to work with the energy storage system to maintain the voltage and frequency stability of the microgrid. In this embodiment, the photovoltaic unit is used for the photovoltaic power output of the new energy unit in the AC / DC microgrid, thereby realizing the control of the coal-fired unit and the energy storage unit in the microgrid.

[0081] Wind unit: The wind unit can also adopt the maximum power point tracking control strategy to achieve maximum power output under different wind speed, air pressure and temperature conditions. In the grid-connected mode, the wind unit converts DC power into AC power with the same frequency and phase as the grid through an inverter, and may need to meet the low voltage ride-through (LVRT) requirements to maintain grid stability. In off-grid mode, the wind unit needs to work with the energy storage system to maintain the voltage and frequency stability of the microgrid. In this embodiment, the photovoltaic unit is used for the wind power output of the new energy unit in the AC / DC microgrid, thereby realizing the control of the coal-fired unit and the energy storage unit in the microgrid.

[0082] Coal-fired units: In AC / DC microgrids, coal-fired units usually refer to units that use coal-fired power generation, which can be used as base load power supply units in microgrids. Since microgrids emphasize the efficient use of distributed energy and the integration of renewable energy, the application of coal-fired power generation units in microgrids may be subject to certain restrictions. Therefore, coal-fired units can be used as peak-shaving resources to cope with the intermittency and instability of renewable energy (such as wind and solar energy).

[0083] Energy storage unit: The energy storage unit can store excess electrical energy and smooth the output fluctuations of renewable energy (such as solar and wind energy), improve its penetration and reliability in the microgrid, and can control the charge and discharge current according to SOC distribution, so as to achieve optimal power distribution and SOC balance to improve the overall performance and reliability of the system.

[0084] Embodiment 1

[0085] Please refer to Figure 1 , an AC / DC microgrid control method provided by an embodiment of the present invention, comprising the following steps S101-S104:

[0086] Step S101: In response to a control request of an AC / DC microgrid, a mapping relationship between historical power generation in a new energy unit and historical weather data is constructed; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit.

[0087] It should be noted that the control request of the AC / DC microgrid refers to a request to control the power generation of the AC / DC microgrid, which can be initiated by a user or a monitoring device; exemplarily, a user can manually generate corresponding control instructions through a console, and then generate a control request based on the control instructions to control the power generation between each unit in the AC / DC microgrid; exemplarily, the monitoring device monitors the new energy units, coal-fired units and energy storage units in the AC / DC microgrid, and collects the current load conditions of the AC / DC microgrid in real time, and performs load forecasting of the AC / DC microgrid, so as to control the power generation of each unit in the AC / DC microgrid in the future.

[0088] In this embodiment, the control request of the AC / DC microgrid can be generated by the upper control system of the microgrid energy management system (such as the corresponding dispatching system if it is connected to the grid dispatching platform) according to the system operation requirements; for some microgrids, the control request can also be generated regularly by the microgrid according to the operation requirements specified for itself (for example, for the next 24 hours or the next 72 hours, etc.). The purpose of this control request is to maintain the future energy balance of the microgrid, which is one of the main control functions of the AC / DC microgrid.

[0089] As a preferred solution, the new energy unit includes a photovoltaic unit and a wind unit, wherein the historical power generation of the photovoltaic unit and the wind unit can be obtained from a historical database, and the historical weather data can be obtained from a weather forecast software.

[0090] In this embodiment, when a control request of an AC / DC microgrid is received, the request is parsed so that the main body of the AC / DC microgrid to be controlled and the corresponding unit can be determined. Then, the historical power generation of the corresponding photovoltaic unit and wind unit, and the historical weather data corresponding to the historical power generation in each time period are obtained, and then a mapping relationship can be established according to the historical power generation of the photovoltaic unit or wind unit in each time period and the corresponding historical weather data.

[0091] Step S102: Acquire future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship.

[0092] In this embodiment, the preset future time period may be a time period of the next month, the next two months, or the next six months, and may be set according to actual circumstances and specific needs.

[0093] In this embodiment, future weather data can be obtained through the weather management platform, or through the numerical weather data published by the meteorological system.

[0094] In this embodiment, according to the mapping relationship between the historical power generation of the photovoltaic unit or wind unit in each time period and its corresponding historical weather data, the historical weather data that is the same as the future weather data and its corresponding historical power generation are obtained, so that the power generation of the photovoltaic unit or wind unit corresponding to the future weather data can be predicted.

[0095] Step S103: Determine the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period.

[0096] In this embodiment, the maximum carbon emissions of the coal-fired unit can be determined based on the power generation equipment and its power in the corresponding power generation system, or it can be determined based on the total target carbon emissions of the new energy unit and the AC / DC microgrid in a preset future time period; therefore, after determining the maximum carbon emissions of the coal-fired unit, the maximum power generation corresponding to the coal-fired unit in the preset future time period can be determined based on the power generation equipment and its power (which can be the coal-fired power generation power) in the power generation system corresponding to the coal-fired unit.

[0097] It should be noted that the preset maximum carbon emission value of the target microgrid can be obtained according to the actual situation, and the carbon emissions of the photovoltaic unit, wind unit and energy storage unit can be obtained through the database.

[0098] In this embodiment, the maximum carbon emissions of the coal-fired unit can be obtained by calculating the difference between the maximum carbon emissions of the AC / DC microgrid (which can also be the target value), the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit, and the carbon emissions of the energy storage unit.

[0099] In another embodiment, the maximum power generation of the coal-fired unit in a preset future time period can be determined based on the maximum carbon emissions of the coal-fired unit in a preset future time period and the coal-fired power generation efficiency, wherein the carbon emissions generated by unit coal burning are obtained through a database storing data information related to the coal-fired unit. Unit coal refers to a standard weight of benchmark coal, for example: Class A coal, 1kg; the carbon emissions generated by unit coal burning refers to the carbon emissions that can be released by a standard unit weight of benchmark coal, for example: the amount of CO2 that can be released by burning 1kg of Class A coal. Finally, the maximum coal burning of the coal-fired unit can be obtained by dividing the maximum carbon emissions of the coal-fired unit in the preset future time period by the carbon emissions generated by the unit coal burning.

[0100] For example, the maximum power generation of the coal-fired unit in the preset future time period can be obtained by multiplying the maximum coal-fired amount of the coal-fired unit in the preset future time period by the power generation efficiency of the coal-fired unit. For example, the maximum carbon emissions of a power plant in January-February of XX is N (carbon emissions are related to costs, and excessive emissions of CO2 will cause additional costs. Because when the carbon emissions approved by the power plant are N, then N is set as the maximum carbon emissions of the power plant. If it exceeds this amount, it is necessary to purchase carbon emissions from other plants, which will increase costs). Therefore, the maximum coal-fired amount of the coal-fired unit in the preset future time period can be calculated through N, and then the maximum power generation in the preset future time period (January-February of XX) can be predicted.

[0101] As a preferred solution of this embodiment, the AC / DC microgrid further includes a carbon emission unit; wherein the carbon emission unit guides the distributed energy and loads in the microgrid to be optimally scheduled through a preset carbon emission quota and a carbon trading mechanism.

[0102] In this embodiment, the AC / DC microgrid also includes a carbon emission unit, wherein the carbon emission unit can be used as part of the microgrid optimization scheduling strategy, by considering the carbon emission quota and the carbon trading mechanism, to guide the distributed energy and load in the microgrid to optimize scheduling, wherein the optimization scheduling strategy aims to reduce the carbon emissions of the microgrid while meeting the demand for power supply, and at the same time, in the operation of the microgrid, the carbon emission unit helps to achieve the coordinated optimization of resources and improve the economic efficiency and environmental protection level of the microgrid operation. Furthermore, the role of the carbon emission unit in the microgrid also includes participating in the carbon trading market, obtaining income by selling carbon quotas, and reducing carbon emissions, which helps the microgrid find a balance between economic and environmental benefits.

[0103] In this embodiment, through the lower-level low-carbon demand response model, the carbon emission cost saved by carbon emission reduction of microgrid users is used as an incentive signal to establish a mapping relationship between the microgrid energy flow and the carbon emission flow, realize the transfer and sharing of carbon emission responsibilities, and refine the carbon emission characteristics of the microgrid operation. At the same time, it is also possible to establish a microgrid hierarchical optimization scheduling model that considers demand response and carbon emission quotas, optimize the load curve by considering time-of-use electricity prices and new energy consumption on the load side of the microgrid, and consider carbon emission limits on the power generation side of the microgrid, and optimize the scheduling of distributed power sources within the microgrid to achieve the goal of minimizing the comprehensive operating cost of the microgrid.

[0104] Step S104: According to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, and in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled.

[0105] In this embodiment, the preset electric energy storage capacity of the energy storage unit can be directly read from the energy storage unit through the acquisition device, and the preset load of the AC / DC microgrid can be set manually or according to the current load demand.

[0106] By way of example, the first result can be obtained by subtracting the sum of the power generation of the photovoltaic unit in the preset future time period and the power generation of the wind unit in the preset future time period from the preset load of the AC / DC microgrid in the preset future time period; the second result can be obtained by adding the maximum power generation of the coal-fired unit in the preset future time period to the electric energy release of the energy storage unit.

[0107] Then, based on the comparison and judgment between the first result and the second result, the power generation of the coal-fired unit and the electric energy release of the energy storage unit to be controlled are finally determined, and then the coal-fired unit and the energy storage unit in the AC / DC microgrid are controlled.

[0108] As a case of comparison and judgment between the first result and the second result, when the first result is less than the second result, the proportion of the current energy storage unit's electric energy storage capacity to the maximum electric energy storage capacity is judged. If the proportion is greater than or equal to the preset proportion threshold, the electric energy release of the energy storage unit is the electric energy storage capacity of the energy storage unit, and the power generation of the coal-fired unit is the difference between the first result and the electric energy storage capacity of the energy storage unit; if the proportion is less than the proportion threshold, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the preset future time period, and the electric energy release of the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the preset future time period.

[0109] As a case of comparison and judgment between the first result and the second result, when the first result is equal to the second result, the amount of electric energy released by the energy storage unit is the amount of electric energy stored in the energy storage unit, and the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in a preset future time period.

[0110] As a case of comparison and judgment between the first result and the second result, when the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the amount of electric energy stored in the energy storage unit, the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in the preset future time period, and the AC / DC microgrid is connected to the grid.

[0111] It can be understood that the first result is calculated based on the future power generation of the new energy unit and the preset load of the AC / DC microgrid; the second result is calculated based on the maximum power generation of the coal-fired unit and the preset electric energy storage capacity of the energy storage unit; the first result and the second result are judged, and based on the judgment result, the power generation of the coal-fired unit and the electric energy release of the energy storage unit are controlled.

[0112] Implementing the above embodiments has the following effects:

[0113] The technical solution of the present invention starts to execute the corresponding AC / DC microgrid control by responding to the control request of the AC / DC microgrid, and predicts and determines the future power generation of the new energy unit by constructing the mapping relationship of the new energy unit, and determines the maximum power generation of the coal-fired unit by the maximum carbon emission of the coal-fired unit. Finally, it can combine the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid to realize the control of the power release or output of the energy storage unit and the coal-fired unit, avoid the load required by the load and the power generation controlled by the AC / DC microgrid, avoid the load on the main power grid caused by controlling the microgrid to be connected to the grid, reduce the impact on the operation of the main power grid, and also improve the accuracy of the microgrid control, avoid the instability of the output release or output power between the units in the AC / DC microgrid, and improve the stability of the AC / DC microgrid.

[0114] Embodiment 2

[0115] An embodiment of the present invention also provides an AC / DC microgrid control method, comprising steps S201 to S203:

[0116] Step S201: In response to a control request of an AC / DC microgrid, a mapping relationship between historical power generation in a new energy unit and historical weather data is constructed; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit.

[0117] As a preferred solution of this embodiment, in response to the control request of the AC / DC microgrid, constructing a mapping relationship between the historical power generation in the new energy unit and the historical weather data specifically includes:

[0118] In response to a control request of an AC / DC microgrid, historical power generation and historical weather data of a new energy unit corresponding to the control request are obtained; based on a time relationship between the historical power generation and historical weather data in the new energy unit, a mapping relationship between the historical power generation and the historical weather data is constructed.

[0119] In this embodiment, by responding to the control request of the AC / DC microgrid and then parsing the control request of the AC / DC microgrid, the historical power generation of the new energy unit, the historical weather data and the future weather data of the preset future time period are obtained. Then, based on the time series relationship, the historical power generation of the new energy unit and the historical weather data are mapped to each other, so as to obtain the mapping relationship between the historical power generation and the historical weather data in the new energy unit.

[0120] As a preferred solution of this embodiment, the new energy unit includes a photovoltaic unit and a wind unit, and the photovoltaic unit and the wind unit respectively have corresponding historical power generation and historical weather data; the mapping relationship between the historical power generation and the historical weather data is constructed based on the time relationship between the historical power generation and the historical weather data in the new energy unit, specifically including:

[0121] Based on the first time relationship between the historical power generation and the historical weather data in the photovoltaic unit, a first mapping relationship corresponding to the historical power generation and the historical weather data of the photovoltaic unit is constructed; based on the second time relationship between the historical power generation and the historical weather data in the wind unit, a second mapping relationship corresponding to the historical power generation and the historical weather data of the photovoltaic unit is constructed.

[0122] In this embodiment, since the new energy unit includes a photovoltaic unit and a wind unit, the photovoltaic unit has corresponding historical power generation and historical weather data, and the wind unit has corresponding historical power generation and historical weather data.

[0123] In this embodiment, based on the time relationship sequence corresponding to the historical power generation in the photovoltaic unit and the historical weather data, that is, the first time relationship, a first mapping relationship between the historical power generation of the photovoltaic unit and the historical weather data can be constructed. Similarly, based on the time relationship sequence corresponding to the historical power generation in the wind unit and the historical weather data, that is, the second time relationship, a second mapping relationship between the historical power generation of the wind unit and the historical weather data can be constructed.

[0124] As a preferred solution of this embodiment, the first mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the first time relationship between the historical power generation and the historical weather data of the photovoltaic unit, specifically including:

[0125] Obtain the dust cleaning interval of the photovoltaic unit, and obtain the sunshine intensity data related to sunshine in the historical weather data of the photovoltaic unit; divide the total time period of the photovoltaic unit between every two dust cleaning intervals into a plurality of first time periods; wherein the first time relationship is the corresponding time relationship between the sunshine intensity data and the historical power generation of the photovoltaic unit in each of the first time periods; construct a first sub-mapping relationship in each of the first time periods according to the sunshine intensity data corresponding to each of the first time periods, and the historical power generation of the photovoltaic unit corresponding to each of the first time periods; and generate a first mapping relationship between the historical power generation and the sunshine intensity data corresponding to the photovoltaic unit according to the first sub-mapping relationship.

[0126] In this embodiment, when an AC / DC microgrid control request is received, the dust cleaning interval of the photovoltaic unit, the sunshine intensity data corresponding to the historical weather data corresponding to the time period between the dust cleaning intervals, and the historical power generation are obtained at the same time, and the sunshine intensity data corresponding to the historical weather data corresponding to the first time period between the dust cleaning intervals and the historical power generation corresponding to the first time period are used to establish a first mapping relationship.

[0127] In this embodiment, the time period of the photovoltaic unit between every two dust cleaning intervals is obtained, and this time period is divided into multiple first time periods. For different first time periods, the relationship between the sunshine intensity and its corresponding historical power generation is established. Specifically, the relationship between the sunshine intensity data corresponding to the historical weather data corresponding to the multiple first time periods and the historical power generation of the photovoltaic unit corresponding to the first time period is summarized to establish a first mapping relationship.

[0128] It should be noted that, since the photovoltaic unit will be affected by dust, the power generation of the photovoltaic unit will change significantly between two dust cleaning intervals. This change will make the power generation controlled by the AC / DC microgrid always have a certain deviation, and the actual power generation will always be less than the required amount, so it will often be connected to the main grid, affecting the main grid. Therefore, by considering the impact of dust, the time between the dust cleaning intervals is divided into multiple time periods, and the relationship between the sunshine intensity in different time periods and the corresponding historical power generation is used to obtain more accurate power generation, avoid deviations, reduce the number of connections to the main grid, and reduce the load on the main grid.

[0129] As a preferred solution of this embodiment, the second mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the second time relationship between the historical power generation and the historical weather data in the wind unit, specifically including:

[0130] Acquire atmospheric state data involving wind speed, temperature and air pressure from historical weather data of the wind unit; divide the total time period of historical power generation of the wind unit into a number of second time periods; wherein the second time relationship is the corresponding time relationship between the sunshine intensity data of the photovoltaic unit and the historical power generation in each of the second time periods; construct a second sub-mapping relationship in each of the second time periods according to the atmospheric state data corresponding to each of the second time periods and the historical power generation of the wind unit corresponding to each of the second time periods; and generate a second mapping relationship between the historical power generation of the wind unit and the atmospheric state data according to the second sub-mapping relationship.

[0131] In this embodiment, the historical power generation of the wind unit and the wind speed data corresponding to the corresponding historical weather data are obtained to establish a second mapping relationship. Furthermore, atmospheric state data involving wind speed, temperature and air pressure in the historical weather data of the wind unit can also be obtained as the corresponding historical weather data.

[0132] In this embodiment, since there is a set of atmospheric state data in each time period to reflect the current wind speed, temperature and air pressure, different weights are assigned to the wind speed, temperature and air pressure based on the atmospheric state data, so that a specific value corresponding to the atmospheric state data can be obtained to reflect the weather conditions of the wind unit in the current environment. Then, the wind unit is divided into several second time periods in the total time period of historical power generation, and according to the atmospheric state data corresponding to each second time period and the historical power generation of the wind unit corresponding to each second time period, the second sub-mapping relationship in each second time period can be accurately constructed, and the second time periods are combined one by one to construct a complete second mapping relationship.

[0133] Step S202: Acquire future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship.

[0134] As a preferred solution of this embodiment, the acquiring of future weather data within a preset future time period and determining the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship specifically includes:

[0135] Obtain future weather data corresponding to the photovoltaic unit and the wind unit respectively within a preset future time period; determine the future power generation of the photovoltaic unit within the preset future time period based on the future weather data and its corresponding first mapping relationship; determine the future power generation of the wind unit within the preset future time period based on the future weather data and its corresponding second mapping relationship.

[0136] In this embodiment, the power generation of the photovoltaic unit within the preset future time period can be determined based on the future weather data within the preset future time period and the first mapping relationship, and the power generation of the wind unit within the preset future time period can be determined based on the future weather data within the preset future time period and the second mapping relationship.

[0137] It should be noted that for the photovoltaic unit, what is obtained is the time period between two dust cleaning time intervals of the photovoltaic unit within the preset future time period and the future weather data corresponding to the preset future time period. For the wind unit, there is no need to consider the impact of the illumination intervals, and the specific time of the corresponding time period can be directly used as the preset future time period.

[0138] As a preferred solution of this embodiment, determining the future power generation of the photovoltaic unit in a preset future time period according to the future weather data and the first mapping relationship corresponding thereto specifically includes:

[0139] Obtain a dust cleaning interval for the photovoltaic unit within a preset future time period, and obtain the sunshine intensity data corresponding to the photovoltaic unit during the dust cleaning interval as future weather data for the photovoltaic unit; determine the power generation in the photovoltaic unit corresponding to its sunshine intensity data according to the first mapping relationship, as the future power generation of the photovoltaic unit within the preset future time period.

[0140] In this embodiment, the time period between two dust cleaning time intervals of the photovoltaic unit within the preset future time period is divided into multiple third time periods. The relationship between the sunshine intensity in different first time periods and the corresponding historical power generation can be obtained through the first mapping relationship. By matching the sunshine intensity in the first time period and the third time period, the power generation of the photovoltaic unit under the sunshine intensity of multiple third time periods within the preset future time period can be known.

[0141] As a preferred solution of this embodiment, determining the future power generation of the wind power unit in a preset future time period according to the future weather data and the second mapping relationship corresponding thereto specifically includes:

[0142] Acquire atmospheric state data corresponding to the wind power unit in a future time period as future weather data of the wind power unit; determine the power generation in the wind power unit corresponding to its atmospheric state data according to the second mapping relationship as the future power generation of the wind power unit in a preset future time period.

[0143] In this embodiment, the wind speed in different time periods and the corresponding historical power generation can be known through the second mapping relationship. When the wind speed corresponding to the future weather data in the preset future time period is known, the power generation of the wind unit in the preset future time period can be predicted.

[0144] Step S203: Determine the maximum power generation corresponding to the coal-fired unit in a preset future time period, and control the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit, the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid.

[0145] Implementing the above embodiments has the following effects:

[0146] The AC / DC microgrid control method of the present invention fully considers the power generation of the new energy unit and the coal-fired unit, and controls the AC / DC microgrid based on the power generation of the three units, the preset load of the AC / DC microgrid and the preset electric energy storage capacity of the energy storage unit, so that the AC / DC microgrid can reduce its dependence on the main power grid when meeting its own needs, reduce the number of grid connections, and further reduce the load of the main grid, thereby ensuring the stable operation of the main power grid.

[0147] Embodiment 3

[0148] An embodiment of the present invention also provides an AC / DC microgrid control method, including steps S301 to S303:

[0149] Step S301: In response to a control request of an AC / DC microgrid, a mapping relationship between historical power generation in a new energy unit and historical weather data is constructed, and the future power generation corresponding to the new energy unit in a preset future time period is determined; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit.

[0150] Step S302: Determine the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period.

[0151] As a preferred solution of this embodiment, before determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period, the method further includes:

[0152] The maximum carbon emissions of the coal-fired unit are determined based on the target maximum carbon emissions of the AC / DC microgrid within a preset future time period, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit.

[0153] In this embodiment, the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit and the carbon emissions of the energy storage unit are obtained, wherein the carbon emissions of the photovoltaic unit and the carbon emissions of the wind unit constitute the carbon emissions of the new energy unit.

[0154] It should be noted that, for the carbon emissions of new energy units, since they do not generate carbon emissions during operation, the main consideration is the carbon saving and reduction effect brought about by their operation, that is, the carbon emissions are considered to be negative. As for the carbon emissions of energy storage units, since they are bidirectional energy units, the unit output loss can be calculated based on the energy storage efficiency, and the lost electricity can be converted according to the benchmark carbon emissions of the power system.

[0155] As a preferred solution of this embodiment, the maximum carbon emissions of the coal-fired unit are determined based on the target maximum carbon emissions of the AC / DC microgrid, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit in a preset future time period, specifically including:

[0156] Obtain the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit and the carbon emissions of the energy storage unit in a preset future time period; calculate the difference between the target maximum carbon emissions of the AC / DC microgrid, the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit and the carbon emissions of the energy storage unit, and obtain the maximum carbon emissions of the coal-fired unit in the preset future time period.

[0157] In this embodiment, the maximum target carbon emission of the AC / DC microgrid, the carbon emission of the photovoltaic unit, the carbon emission of the wind unit, and the difference between the carbon emission of the energy storage unit are calculated to obtain the maximum carbon emission of the coal-fired unit. The calculation formula is as follows:

[0158]

[0159] in, represents the maximum carbon emission of a coal-fired unit, represents the maximum target carbon emission of the AC / DC microgrid, represents the carbon emissions of the photovoltaic unit, represents the carbon emissions of the wind unit, Represents the carbon emissions of the energy storage unit.

[0160] As a preferred solution of this embodiment, determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period specifically includes:

[0161] Obtain the carbon emissions corresponding to each unit of coal burning; calculate the ratio between the maximum carbon emissions of the coal-burning unit in the preset future time period and the carbon emissions corresponding to the unit of coal burning, and obtain the maximum coal burning of the coal-burning unit; based on the maximum coal burning and the preset coal-burning power generation efficiency, obtain the maximum power generation of the coal-burning unit in the preset future time period.

[0162] In this embodiment, the carbon emission per unit of coal burning can be obtained through a database storing relevant data information of the coal burning unit. The maximum coal burning amount of the coal burning unit is obtained by dividing the maximum carbon emission of the coal burning unit in a preset future time period by the carbon emission per unit of coal burning, and the maximum coal burning amount of the coal burning unit can be obtained. The maximum coal burning amount of the coal burning unit in the preset future time period is multiplied by the power generation efficiency of the coal burning unit to obtain the maximum power generation amount of the coal burning unit in the preset future time period. Among them, the power generation efficiency of the coal burning unit can adopt the usual efficiency of ordinary coal-fired power generation equipment.

[0163] In this embodiment, in an actual AC / DC microgrid, the carbon emissions of photovoltaic units, wind units and energy storage units cannot be ignored due to their large size. If this part is ignored, the maximum power generation of the coal-fired unit in the future time period will increase, and finally cause a deviation, so that the last microgrid continues to be connected to the main grid, causing the main grid to generate load.

[0164] Step S303: According to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, and in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled.

[0165] As a preferred solution of this embodiment, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, specifically including:

[0166] Obtain a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period; calculate the power generation outside the new energy unit as a first result based on the preset load of the AC / DC microgrid, the future power generation of the photovoltaic unit, and the future power generation of the wind unit within the preset future time period; calculate the maximum power generation between the coal-fired unit and the energy storage unit as a second result based on the maximum power generation of the corresponding coal-fired unit and the preset electric energy storage capacity of the energy storage unit within the preset future time period; determine the electric energy release of the energy storage unit and the power generation of the coal-fired unit based on the first result and the second result; control the energy storage unit and the coal-fired unit of the AC / DC microgrid according to the electric energy release of the energy storage unit and the power generation of the coal-fired unit.

[0167] In this embodiment, the load of the target microgrid and the electric energy storage of the energy storage unit in the preset future time period are obtained, and the difference between the load of the target microgrid, the power generation of the photovoltaic unit and the power generation of the wind unit in the preset future time period is calculated to generate a first result; and the sum of the maximum power generation of the corresponding coal-fired unit and the electric energy storage of the energy storage unit in the preset future time period is calculated to generate a second result. Through the first result and the second result, it is judged whether the ratio between the current electric energy storage of the energy storage unit and the maximum electric energy storage is greater than or equal to the ratio threshold (preset threshold), and a judgment result is generated, and finally the power generation of the coal-fired unit and the electric energy release of the energy storage unit are controlled according to the judgment result.

[0168] In this embodiment, the load of the target microgrid and the amount of electric energy stored in the energy storage unit in a preset future time period can be obtained through a database, etc. Among them, the proportion threshold is a threshold set according to actual conditions and is not limited here.

[0169] In this embodiment, the first result is obtained by subtracting the load of the target microgrid in the preset future time period from the power generation of the photovoltaic unit in the preset future time period - the power generation of the wind unit in the preset future time period; the second result is obtained by adding the maximum power generation of the coal-fired unit in the preset future time period to the electric energy release of the energy storage unit.

[0170] As a preferred solution of this embodiment, the step of obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period specifically includes:

[0171] Acquire historical load data of the AC / DC microgrid; perform function fitting on the historical load data of the AC / DC microgrid, and predict the data after function fitting based on a preset future time period to obtain a preset load of the AC / DC microgrid in the preset future time period; acquire the current real-time power value of the energy storage unit, and use it as the real-time power value of the first reference time period in the future time; wherein the future time includes several reference time periods, and the preset future time period is one of the reference time periods; based on the power balance rule, take the real-time power value as the initial value, and recursively calculate the real-time power value of the energy storage unit in each reference time period one by one, and obtain the real-time power value in the preset future time period as the preset electric energy storage amount of the energy storage unit in the future time period.

[0172] In this embodiment, by acquiring the historical load data of the AC / DC microgrid, it is possible to perform function fitting on the historical load data of the AC / DC microgrid, and based on a preset future time period, predict the data after function fitting to obtain the preset load of the AC / DC microgrid in the preset future time period; wherein, the historical load data of the AC / DC microgrid can be directly obtained through a historical database or the like. By predicting the data after function fitting, load prediction can be performed based on a variety of models, including time series analysis, neural networks, support vector machines, etc., for example, recurrent neural networks such as long short-term memory networks.

[0173] In this embodiment, the preset electric energy storage capacity of the energy storage unit refers to the energy storage system power SOC at the beginning of the calculation time period. After the value of the first reference time point is obtained according to the energy storage system device, each time period is recursively calculated one by one according to the power balance rule, and finally the real-time power value in the preset future time period is obtained as the preset electric energy storage capacity of the energy storage unit in the future time period. Among them, the future time includes several reference time periods, and the preset future time period is one of the reference time periods.

[0174] As a preferred solution of this embodiment, determining the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically includes:

[0175] When the first result is equal to the second result, it is determined that the amount of electric energy released by the energy storage unit is the preset electric energy storage amount of the energy storage unit, and the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the preset future time period; when the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the preset electric energy storage amount of the energy storage unit, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the future time period, and the AC / DC microgrid is connected to the grid.

[0176] As a preferred solution of this embodiment, the determining of the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically further includes:

[0177] When the first result is less than the second result, determine the proportion of the preset electric energy storage capacity of the energy storage unit to the maximum electric energy storage capacity; if the proportion is greater than or equal to the preset threshold value, the electric energy released by the energy storage unit is the preset electric energy storage capacity of the energy storage unit, and the power generation of the coal-fired unit is the difference between the first result and the preset electric energy storage capacity of the energy storage unit; if the proportion is less than the preset threshold value, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the future time period, and the electric energy released by the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the future time period.

[0178] In this embodiment, when the first result is less than the second result, the proportion of the current electric energy storage capacity of the energy storage unit to the maximum electric energy storage capacity is determined. If the proportion is greater than or equal to the preset threshold value, the electric energy released by the energy storage unit is the electric energy storage capacity of the energy storage unit, and the power generation of the coal-fired unit is the difference between the first result and the electric energy storage capacity of the energy storage unit; if the proportion is less than the preset threshold value, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the preset future time period, and the electric energy released by the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the preset future time period.

[0179] Further, when the first result is equal to the second result, the electric energy released by the energy storage unit is the electric energy stored in the energy storage unit, and the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in a preset future time period.

[0180] Furthermore, when the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the amount of electric energy stored in the energy storage unit, the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in a preset future time period, and the AC / DC microgrid is connected to the grid.

[0181] As a preferred solution of this embodiment, the AC / DC microgrid further includes a carbon emission unit; wherein the carbon emission unit guides the distributed energy and loads in the microgrid to be optimally scheduled through a preset carbon emission quota and a carbon trading mechanism.

[0182] It should be noted that the preset carbon emission quota is the total amount of greenhouse gases (measured in carbon dioxide equivalent) emitted into the atmosphere by the AC / DC microgrid within a certain period of time. The carbon trading mechanism uses market-based means to trade carbon emission rights as commodities. If the emissions of the AC / DC microgrid exceed the allocated quota, additional quotas will need to be purchased on the market; if the emissions of the AC / DC microgrid are lower than the quota, the excess quotas can be sold to optimize the emission reduction costs.

[0183] In this embodiment, the AC / DC microgrid also includes a carbon emission unit, which interacts and iterates with each other through the interaction between the upper-level unit optimal economic dispatch and the lower-level price demand response. The double-layer low-carbon model effectively balances the economy of the unit output and the energy efficiency of carbon emission reduction on the load side. Preferably, an upper-layer optimization dispatching model and a lower-layer low-carbon demand response model can be constructed, that is, an upper-layer optimization dispatching model with a wind, solar, and hydrogen storage integrated industrial park as a typical scenario is constructed, the source-side carbon trading mechanism is integrated into the dispatching decision-making objectives, and the optimal low-carbon economic dispatching strategy of the microgrid is formulated. The carbon emission cost saved by the carbon emission reduction of microgrid users is used as an incentive signal to establish a mapping relationship between the energy flow of the microgrid and the carbon emission flow, so as to realize the transfer and sharing of carbon emission responsibilities. The carbon emission characteristics in the operation of the microgrid are refined and evaluated, and then A low-carbon demand response model is established to guide users to participate in carbon emission reduction strategies by the temporal and spatial differences in load carbon emission intensity, so that the synergy between the low carbon and economy of the microgrid source and load can be deeply explored, and diversified demand-side response behaviors are adopted with the goal of accurately tracking the new energy output curve. The user's energy consumption behavior is adjusted and fed back to the upper-level model, realizing the optimization of the load curve. At the same time, the upper and lower models are repeatedly iterated according to the feedback conditions until convergence, realizing the coordinated optimization of the low carbon and economy of the microgrid.

[0184] Implementing the above embodiments has the following effects:

[0185] The AC / DC microgrid control method of the present invention fully considers the power generation of the new energy unit and the coal-fired unit, and controls the AC / DC microgrid based on the power generation of the three units, the preset load of the AC / DC microgrid and the preset electric energy storage capacity of the energy storage unit, so that the AC / DC microgrid can reduce its dependence on the main power grid when meeting its own needs, reduce the number of grid connections, and further reduce the load of the main grid, thereby ensuring the stable operation of the main power grid.

[0186] Embodiment 4

[0187] See also Figure 4 , which is an AC / DC microgrid control device provided by the present invention, including: a mapping relationship module 401, a future power generation module 402, a maximum power generation module 403 and a power generation control module 404;

[0188] The mapping relationship module 401 is used to construct a mapping relationship between the historical power generation in the new energy unit and the historical weather data in response to the control request of the AC / DC microgrid; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit;

[0189] The future power generation module 402 is used to obtain future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship;

[0190] The maximum power generation module 403 is used to determine the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period;

[0191] The power generation control module 404 is used to control the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, combined with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid.

[0192] As a preferred solution, the mapping relationship module 401 is specifically used for:

[0193] In response to a control request of the AC / DC microgrid, obtaining historical power generation and historical weather data of the new energy unit corresponding to the control request;

[0194] Based on the time relationship between the historical power generation in the new energy unit and the historical weather data, a mapping relationship between the historical power generation and the historical weather data is constructed.

[0195] As a preferred solution, the new energy unit includes a photovoltaic unit and a wind unit, and the photovoltaic unit and the wind unit respectively have corresponding historical power generation and historical weather data; the mapping relationship between the historical power generation and the historical weather data is constructed based on the time relationship between the historical power generation and the historical weather data in the new energy unit, specifically including:

[0196] Based on a first time relationship between the historical power generation in the photovoltaic unit and the historical weather data, construct a first mapping relationship between the historical power generation and the historical weather data corresponding to the photovoltaic unit;

[0197] Based on the second time relationship between the historical power generation and the historical weather data in the wind unit, a second mapping relationship corresponding to the historical power generation and the historical weather data of the photovoltaic unit is constructed.

[0198] As a preferred solution, the first mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the first time relationship between the historical power generation and the historical weather data of the photovoltaic unit, specifically including:

[0199] Obtaining a dust cleaning interval of the photovoltaic unit, and obtaining sunshine intensity data related to sunshine in historical weather data of the photovoltaic unit;

[0200] Divide the total time period of the photovoltaic unit between each two dust cleaning intervals into a plurality of first time periods; wherein the first time relationship is the corresponding time relationship between the sunshine intensity data and the historical power generation of the photovoltaic unit in each of the first time periods;

[0201] Constructing a first sub-mapping relationship in each of the first time periods according to the sunshine intensity data corresponding to each of the first time periods and the historical power generation of the photovoltaic unit corresponding to each of the first time periods;

[0202] According to the first sub-mapping relationship, a first mapping relationship between the historical power generation and sunshine intensity data of the photovoltaic unit is generated.

[0203] As a preferred solution, the second mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit is constructed based on the second time relationship between the historical power generation and the historical weather data in the wind unit, specifically including:

[0204] Acquire atmospheric state data involving wind speed, temperature and air pressure from historical weather data of the wind power unit;

[0205] Divide the total time period of historical power generation of the wind unit into a plurality of second time periods; wherein the second time relationship is the time relationship between the sunshine intensity data of the photovoltaic unit and the historical power generation in each of the second time periods;

[0206] Constructing a second sub-mapping relationship in each of the second time periods according to the atmospheric state data corresponding to each of the second time periods and the historical power generation of the wind power unit corresponding to each of the second time periods;

[0207] According to the second sub-mapping relationship, a second mapping relationship between the historical power generation of the wind power unit and the atmospheric state data is generated.

[0208] As a preferred solution, the future power generation module 402 is specifically used for:

[0209] Obtaining future weather data corresponding to the photovoltaic unit and the wind unit respectively within a preset future time period;

[0210] Determining the future power generation of the photovoltaic unit within a preset future time period according to the future weather data and the first corresponding mapping relationship;

[0211] The future power generation of the wind power unit within a preset future time period is determined according to the future weather data and the second mapping relationship corresponding thereto.

[0212] As a preferred solution, determining the future power generation of the photovoltaic unit in a preset future time period according to the future weather data and the first mapping relationship corresponding thereto specifically includes:

[0213] Obtaining a dust cleaning interval of the photovoltaic unit within a preset future time period, and obtaining sunshine intensity data corresponding to the photovoltaic unit in the dust cleaning interval as future weather data of the photovoltaic unit;

[0214] According to the first mapping relationship, the power generation of the photovoltaic unit corresponding to its sunshine intensity data is determined as the future power generation of the photovoltaic unit in a preset future time period.

[0215] As a preferred solution, determining the future power generation of the wind power unit in a preset future time period according to the future weather data and the second mapping relationship corresponding thereto specifically includes:

[0216] Acquire atmospheric state data corresponding to the wind unit in a future time period as future weather data of the wind unit;

[0217] According to the second mapping relationship, the power generation of the wind power unit corresponding to its atmospheric state data is determined as the future power generation of the wind power unit in a preset future time period.

[0218] As a preferred solution, it also includes: a carbon emission module;

[0219] The carbon emission module is used to determine the maximum carbon emissions of the coal-fired unit based on the target maximum carbon emissions of the AC / DC microgrid within a preset future time period, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit.

[0220] As a preferred solution, the carbon emission module is specifically used for:

[0221] Obtaining the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit, and the carbon emissions of the energy storage unit within a preset future time period;

[0222] The target maximum carbon emission value of the AC / DC microgrid, the carbon emission of the photovoltaic unit, the carbon emission of the wind unit and the difference between the carbon emission of the energy storage unit are calculated to obtain the maximum carbon emission of the coal-fired unit in a preset future time period.

[0223] As a preferred solution, the maximum power generation module 403 specifically includes:

[0224] Obtain the carbon emissions corresponding to each unit of coal burning;

[0225] Calculate the ratio between the maximum carbon emission of the coal-fired unit in the preset future time period and the carbon emission corresponding to the unit coal combustion to obtain the maximum coal combustion of the coal-fired unit;

[0226] Based on the maximum coal burning amount and the preset coal burning power generation efficiency, the maximum power generation amount of the coal burning unit in the preset future time period is obtained.

[0227] As a preferred solution, the power generation control module 404 is specifically used for:

[0228] Obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period;

[0229] According to the preset load of the AC / DC microgrid, the future power generation of the photovoltaic unit and the future power generation of the wind unit in a preset future time period, the power generation outside the new energy unit is calculated as a first result;

[0230] According to the maximum power generation of the coal-fired unit and the preset electric energy storage capacity of the energy storage unit corresponding to the preset future time period, the maximum power generation between the coal-fired unit and the energy storage unit is calculated as the second result;

[0231] Based on the first result and the second result, determining the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit;

[0232] The energy storage unit and the coal-fired unit of the AC / DC microgrid are controlled according to the electric energy released by the energy storage unit and the power generated by the coal-fired unit.

[0233] As a preferred solution, the step of obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period specifically includes:

[0234] Acquire historical load data of the AC / DC microgrid;

[0235] Performing function fitting on the historical load data of the AC / DC microgrid, and predicting the data after function fitting based on a preset future time period to obtain a preset load of the AC / DC microgrid in the preset future time period;

[0236] Obtaining the current real-time power value of the energy storage unit and using it as the real-time power value of the first reference time period in the future time; wherein the future time includes a plurality of reference time periods, and the preset future time period is one of the reference time periods;

[0237] Based on the power balance rule, taking the real-time power value as the initial value, the real-time power value of the energy storage unit in each reference time period is recursively calculated one by one, and the real-time power value in the preset future time period is obtained as the preset electric energy storage capacity of the energy storage unit in the future time period.

[0238] As a preferred solution, the determining of the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically includes:

[0239] When the first result is equal to the second result, it is determined that the electric energy release amount of the energy storage unit is the preset electric energy storage amount of the energy storage unit, and the power generation amount of the coal-fired unit is the maximum power generation amount of the coal-fired unit in the preset future time period;

[0240] When the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in the future time period, and the AC / DC microgrid is connected to the grid.

[0241] As a preferred solution, the determining of the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically further includes:

[0242] When the first result is less than the second result, determining the proportion of the preset electric energy storage capacity of the energy storage unit to the maximum electric energy storage capacity;

[0243] If the proportion is greater than or equal to the preset threshold, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, and the amount of power generated by the coal-fired unit is the difference between the first result and the preset amount of electric energy stored in the energy storage unit;

[0244] If the proportion is less than the preset threshold, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the future time period, and the electric energy released by the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the future time period.

[0245] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0246] Embodiment 5

[0247] Correspondingly, the present invention also provides a terminal device, comprising: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the AC / DC microgrid control method as described in any one of the above embodiments is implemented.

[0248] The terminal device of this embodiment includes: a processor, a memory, and a computer program and a computer instruction stored in the memory and executable on the processor. When the processor executes the computer program, each step in the above-mentioned embodiment 1 is implemented, for example: Figure 1 Alternatively, when the processor executes the computer program, the functions of each module / unit in the above device embodiment, such as the power generation control module 404, are implemented.

[0249] Exemplarily, the computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device. For example, the power generation control module 404 is used to control the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid.

[0250] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. The terminal device may include more or fewer components than shown in the diagram, or may combine certain components, or different components. For example, the terminal device may also include an input / output device, a network access device, a bus, etc.

[0251] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the terminal device, and uses various interfaces and lines to connect various parts of the entire terminal device.

[0252] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the terminal device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function, etc.; the data storage area can store data created according to the use of the mobile terminal, etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0253] Wherein, if the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0254] Embodiment 6

[0255] Accordingly, the present invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the AC / DC microgrid control method as described in any one of the above embodiments.

[0256] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling an AC / DC microgrid, characterized in that: include: In response to a control request of an AC / DC microgrid, a mapping relationship between historical power generation in a new energy unit and historical weather data is constructed; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit, and an energy storage unit; Acquire future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship; Determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period; According to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, and in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, the power generation of the coal-fired unit and the power release of the energy storage unit are controlled.

2. The AC / DC microgrid control method according to claim 1, characterized in that: The step of responding to the control request of the AC / DC microgrid and constructing a mapping relationship between the historical power generation in the new energy unit and the historical weather data specifically includes: In response to a control request of the AC / DC microgrid, obtaining historical power generation and historical weather data of the new energy unit corresponding to the control request; Based on the time relationship between the historical power generation in the new energy unit and the historical weather data, a mapping relationship between the historical power generation and the historical weather data is constructed.

3. The AC / DC microgrid control method according to claim 2, characterized in that: The new energy unit includes a photovoltaic unit and a wind unit, and the photovoltaic unit and the wind unit respectively have corresponding historical power generation and historical weather data; the mapping relationship between the historical power generation and the historical weather data is constructed based on the time relationship between the historical power generation and the historical weather data in the new energy unit, specifically including: Based on a first time relationship between the historical power generation in the photovoltaic unit and the historical weather data, construct a first mapping relationship between the historical power generation and the historical weather data corresponding to the photovoltaic unit; Based on the second time relationship between the historical power generation and the historical weather data in the wind unit, a second mapping relationship corresponding to the historical power generation and the historical weather data of the photovoltaic unit is constructed.

4. The AC / DC microgrid control method according to claim 3, characterized in that: The step of constructing a first mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit based on the first time relationship between the historical power generation and the historical weather data of the photovoltaic unit specifically includes: Obtaining a dust cleaning interval of the photovoltaic unit, and obtaining sunshine intensity data related to sunshine in historical weather data of the photovoltaic unit; Divide the total time period of the photovoltaic unit between each two dust cleaning intervals into a plurality of first time periods; wherein the first time relationship is the corresponding time relationship between the sunshine intensity data and the historical power generation of the photovoltaic unit in each of the first time periods; Constructing a first sub-mapping relationship in each of the first time periods according to the sunshine intensity data corresponding to each of the first time periods and the historical power generation of the photovoltaic unit corresponding to each of the first time periods; According to the first sub-mapping relationship, a first mapping relationship between the historical power generation and sunshine intensity data of the photovoltaic unit is generated.

5. The AC / DC microgrid control method according to claim 3, characterized in that: The constructing of a second mapping relationship between the historical power generation and the historical weather data of the photovoltaic unit based on the second time relationship between the historical power generation and the historical weather data of the wind unit specifically includes: Acquire atmospheric state data involving wind speed, temperature and air pressure from historical weather data of the wind power unit; Divide the total time period of historical power generation of the wind unit into a plurality of second time periods; wherein the second time relationship is the time relationship between the sunshine intensity data of the photovoltaic unit and the historical power generation in each of the second time periods; Constructing a second sub-mapping relationship in each of the second time periods according to the atmospheric state data corresponding to each of the second time periods and the historical power generation of the wind power unit corresponding to each of the second time periods; According to the second sub-mapping relationship, a second mapping relationship between the historical power generation of the wind power unit and the atmospheric state data is generated.

6. An AC / DC microgrid control method according to any one of claims 3 to 5, characterized in that: The acquiring of future weather data within a preset future time period, and determining the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship, specifically includes: Obtaining future weather data corresponding to the photovoltaic unit and the wind unit respectively within a preset future time period; Determining the future power generation of the photovoltaic unit within a preset future time period according to the future weather data and the first corresponding mapping relationship; The future power generation of the wind power unit within a preset future time period is determined according to the future weather data and the second mapping relationship corresponding thereto.

7. The AC / DC microgrid control method according to claim 6, characterized in that: The determining, according to the future weather data and the first corresponding mapping relationship, the future power generation of the photovoltaic unit in a preset future time period specifically includes: Obtaining a dust cleaning interval of the photovoltaic unit within a preset future time period, and obtaining sunshine intensity data corresponding to the photovoltaic unit in the dust cleaning interval as future weather data of the photovoltaic unit; According to the first mapping relationship, the power generation of the photovoltaic unit corresponding to its sunshine intensity data is determined as the future power generation of the photovoltaic unit in a preset future time period.

8. The AC / DC microgrid control method according to claim 6, characterized in that: Determining the future power generation of the wind power unit within a preset future time period according to the future weather data and the second mapping relationship corresponding thereto specifically includes: Acquire atmospheric state data corresponding to the wind power unit in a future time period as future weather data of the wind power unit; According to the second mapping relationship, the power generation of the wind power unit corresponding to its atmospheric state data is determined as the future power generation of the wind power unit in a preset future time period.

9. An AC / DC microgrid control method according to any one of claims 3 to 5, characterized in that: Before determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period, the method further includes: The maximum carbon emissions of the coal-fired unit are determined based on the target maximum carbon emissions of the AC / DC microgrid within a preset future time period, the carbon emissions of the new energy unit and the carbon emissions of the energy storage unit.

10. The AC / DC microgrid control method according to claim 9, characterized in that: The determining of the maximum carbon emission of the coal-fired unit based on the target maximum carbon emission of the AC / DC microgrid, the carbon emission of the new energy unit and the carbon emission of the energy storage unit in a preset future time period specifically includes: Obtaining the carbon emissions of the photovoltaic unit, the carbon emissions of the wind unit, and the carbon emissions of the energy storage unit within a preset future time period; The target maximum carbon emission value of the AC / DC microgrid, the carbon emission of the photovoltaic unit, the carbon emission of the wind unit and the difference between the carbon emission of the energy storage unit are calculated to obtain the maximum carbon emission of the coal-fired unit in a preset future time period.

11. An AC / DC microgrid control method according to any one of claims 1 to 5, characterized in that: Determining the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period specifically includes: Obtain the carbon emissions corresponding to each unit of coal burning; Calculate the ratio between the maximum carbon emission of the coal-fired unit in the preset future time period and the carbon emission corresponding to the unit coal combustion to obtain the maximum coal combustion of the coal-fired unit; Based on the maximum coal burning amount and the preset coal burning power generation efficiency, the maximum power generation amount of the coal burning unit in the preset future time period is obtained.

12. An AC / DC microgrid control method according to any one of claims 1 to 5, characterized in that: The controlling of the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, in combination with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid, specifically includes: Obtaining a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period; According to the preset load of the AC / DC microgrid and the future power generation of the new energy unit in a preset future time period, the power generation outside the new energy unit is calculated as a first result; According to the maximum power generation of the coal-fired unit and the preset electric energy storage capacity of the energy storage unit corresponding to the preset future time period, the maximum power generation between the coal-fired unit and the energy storage unit is calculated as the second result; Based on the first result and the second result, determining the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit; The energy storage unit and the coal-fired unit of the AC / DC microgrid are controlled according to the electric energy released by the energy storage unit and the power generated by the coal-fired unit.

13. The AC / DC microgrid control method according to claim 12, characterized in that: The obtaining of a preset load of the AC / DC microgrid and a preset electric energy storage capacity of the energy storage unit within a preset future time period specifically includes: Acquire historical load data of the AC / DC microgrid; Performing function fitting on the historical load data of the AC / DC microgrid, and predicting the data after function fitting based on a preset future time period to obtain a preset load of the AC / DC microgrid in the preset future time period; Obtaining the current real-time power value of the energy storage unit and using it as the real-time power value of the first reference time period in the future time; wherein the future time includes a plurality of reference time periods, and the preset future time period is one of the reference time periods; Based on the power balance rule, taking the real-time power value as the initial value, the real-time power value of the energy storage unit in each reference time period is recursively calculated one by one, and the real-time power value in the preset future time period is obtained as the preset electric energy storage capacity of the energy storage unit in the future time period.

14. The AC / DC microgrid control method according to claim 12, characterized in that: The determining, based on the first result and the second result, the amount of electric energy released by the energy storage unit and the amount of power generated by the coal-fired unit specifically includes: When the first result is equal to the second result, it is determined that the electric energy release amount of the energy storage unit is the preset electric energy storage amount of the energy storage unit, and the power generation amount of the coal-fired unit is the maximum power generation amount of the coal-fired unit in the preset future time period; When the first result is greater than the second result, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, the amount of power generated by the coal-fired unit is the maximum amount of power generated by the coal-fired unit in the future time period, and the AC / DC microgrid is connected to the grid.

15. The AC / DC microgrid control method according to claim 12, characterized in that: The step of determining the electric energy release amount of the energy storage unit and the power generation amount of the coal-fired unit based on the first result and the second result specifically further includes: When the first result is less than the second result, determining the proportion of the preset electric energy storage capacity of the energy storage unit to the maximum electric energy storage capacity; If the proportion is greater than or equal to the preset threshold, the amount of electric energy released by the energy storage unit is the preset amount of electric energy stored in the energy storage unit, and the amount of power generated by the coal-fired unit is the difference between the first result and the preset amount of electric energy stored in the energy storage unit; If the proportion is less than the preset threshold, the power generation of the coal-fired unit is the maximum power generation of the coal-fired unit in the future time period, and the electric energy released by the energy storage unit is the difference between the first result and the maximum power generation of the coal-fired unit in the future time period.

16. An AC / DC microgrid control method according to any one of claims 1 to 5, characterized in that: The AC / DC microgrid also includes a carbon emission unit, wherein the carbon emission unit guides the distributed energy and loads in the microgrid to be optimally dispatched through a preset carbon emission quota and a carbon trading mechanism.

17. An AC / DC microgrid control device, characterized in that: include: Mapping relationship module, future power generation module, maximum power generation module and power generation control module; The mapping relationship module is used to construct a mapping relationship between the historical power generation in the new energy unit and the historical weather data in response to the control request of the AC / DC microgrid; wherein the AC / DC microgrid includes a new energy unit, a coal-fired unit and an energy storage unit; The future power generation module is used to obtain future weather data within a preset future time period, and determine the future power generation corresponding to the new energy unit within the preset future time period according to the mapping relationship; The maximum power generation module is used to determine the maximum power generation corresponding to the coal-fired unit in the preset future time period according to the maximum carbon emission of the coal-fired unit in the preset future time period; The power generation control module is used to control the power generation of the coal-fired unit and the power release of the energy storage unit according to the future power generation of the new energy unit and the maximum power generation of the coal-fired unit, combined with the preset power storage capacity of the energy storage unit and the preset load of the AC / DC microgrid.

18. A terminal device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the AC / DC microgrid control method according to any one of claims 1 to 16 is implemented.

19. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the AC / DC microgrid control method according to any one of claims 1 to 16.

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